“The U.S. Fish and Wildlife Service has finalized a rule downlisting the razorback sucker from an endangered to a threatened species under the Endangered Species Act. The action is accompanied by a 4(d) rule that allows limited take of the fish for actions associated with the species’ conservation…
Conservation measures, such as propagation and stocking, nonnative fish control, instream flow, research and monitoring, and habitat restoration, have improved conditions in many areas of the Colorado River basin that have historically supported populations. Razorback suckers are now found in eight populations; four of those populations can migrate and spawn in multiple locations. The largest population, located in the Green River of the upper Colorado River basin, now includes about 36,000 adults, up from roughly 100 wild fish in the late 1990s.”
